Indemnity Supplemental Information (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed financial statements
Service agreement fee received	$ 7	$ 7
Net investment income received	106	110
Limited partnership distributions	46	25
Commissions and bonuses paid to agents	(197)	(180)
Income taxes paid	(3)	(52)
Net cash provided by (used in) operating activities	127	72
Net cash provided by (used in) investing activities	(133)	(22)
Net cash provided by (used in) financing activities	(6)	(36)
Net increase (decrease) in cash and cash equivalents	(12)	14
Cash and cash equivalents at beginning of period	400	185
Cash and cash equivalents at end of period	388	199
Indemnity
Condensed financial statements
Management fee received	288	266
Service agreement fee received	7	7
Net investment income received	5	7
Limited partnership distributions	7	3
Increase in reimbursements collected from affiliates	2	0
Commissions and bonuses paid to agents	(197)	(180)
Salaries and wages paid	(44)	(34)
Pension contribution and employee benefits paid	(22)	(27)
General operating expenses paid	(45)	(33)
Income taxes paid	(2)	0
Net cash provided by (used in) operating activities	(1)	9
Net cash provided by (used in) investing activities	45	53
Net cash provided by (used in) financing activities	(15)	(45)
Net increase (decrease) in cash and cash equivalents	29	17
Cash and cash equivalents at beginning of period	12	11
Cash and cash equivalents at end of period	$ 41	$ 28